Finding potential difference in a circuit

[songoku]

Homework Statement

Please see below

Relevant Equations

Kirchhoff Law

I have found part (a):
current on the left is 7/12 A from A to B
current on the middle is 5/36 A from F to C
current on the right is 13/18 A from D to E

For part (b), what is the meaning of V_BF? Is it V_B - V_F or V_F - V_B?

My attempt is:
V_BF = I₁ x R₁ - ε₁ = 7/12 x 4 - 1.5 = 5/6 V

Is it correct?

Thanks

 

[Rap]

Homework Statement: Please see below
Relevant Equations: Kirchhoff Law

View attachment 370977

I have found part (a):
current on the left is 7/12 A from A to B
current on the middle is 5/36 A from F to C
current on the right is 13/18 A from D to E

For part (b), what is the meaning of V_BF? Is it V_B - V_F or V_F - V_B?

My attempt is:
V_BF = I₁ x R₁ - ε₁ = 7/12 x 4 - 1.5 = 5/6 V

Is it correct?

Thanks

VBF is the voltage drop from point B to point F and yes, that's correct.